2020
DOI: 10.1103/physrevresearch.2.043075
|View full text |Cite|
|
Sign up to set email alerts
|

Emergent PT symmetry in a double-quantum-dot circuit QED setup

Abstract: Open classical and quantum systems with effective parity-time (PT) symmetry, over the past five years, have shown tremendous promise for advances in lasers, sensing, and nonreciprocal devices. And yet, how such effective PT-symmetric non-Hermitian models emerge out of Hermitian quantum mechanics is not well understood. Here, starting from a fully Hermitian microscopic Hamiltonian description, we show that a non-Hermitian Hamiltonian emerges naturally in a double-quantum-dot (DQD) circuit-QED setup, which can b… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
24
0

Year Published

2020
2020
2023
2023

Publication Types

Select...
6
3

Relationship

0
9

Authors

Journals

citations
Cited by 31 publications
(24 citation statements)
references
References 121 publications
(314 reference statements)
0
24
0
Order By: Relevance
“…However, implementing such a system can raise some issues. On the one hand, a gain like the one previously considered is an approximation holding up to not too long times (to avoid insurgence of non-linearities) [19]. On the other hand it is nonsensical when working ab initio with nonlinear systems (such as a two-level atom).…”
Section: Passive -Pt Symmetrymentioning
confidence: 99%
See 1 more Smart Citation
“…However, implementing such a system can raise some issues. On the one hand, a gain like the one previously considered is an approximation holding up to not too long times (to avoid insurgence of non-linearities) [19]. On the other hand it is nonsensical when working ab initio with nonlinear systems (such as a two-level atom).…”
Section: Passive -Pt Symmetrymentioning
confidence: 99%
“…This system can be implemented in a variety of ways [14], including coupled waveguides [15], microcavities [31] and in double-quantum-dot circuit QED setups [19]. As for the general case of N modes, from Eq.…”
Section: Non-hermitian Mean-field Dynamics From Gksl Master Equationmentioning
confidence: 99%
“…These points are known as exceptional points (EPs). Owing to the EPs open pathways for new functionalities and performance, so far, various physical systems have been studied the concepts of EPs both theoretically and experimentally, including cavity magnonics systems [22][23][24][25][26][27], cavity optomechanical systems [28][29][30][31], non-Hermitian optical gyroscopes [32], two-level quantum dots (QDs) cavity QED systems [33][34][35] and directly or indirectly coupled microresonators [36][37][38].…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, it is still an unresolved question how to formally define PT -symmetry for dissipative quantum systems [32] and if the breaking of this symmetry can exist at all at a microscopic level [31]. In several previous studies this question has been addressed by looking at coupled quantum oscillators [17,[28][29][30][31][34][35][36][37][38][39] or bosonic atoms [40] with gain and loss, or at equivalent coherent, but unstable systems [41]. In such settings, the symmetry-breaking effect can still be observed in the dynamics of the mean amplitudes, which simply reproduce the classical equations of motion, while quantum effects lead to increased fluctuations.…”
Section: Introductionmentioning
confidence: 99%